Mine-car skid



July .3, i923. 'r. CAMPBELL MINE CAR SKID Fiied Aug. 4, 1 920 2d INVENTOR.

TL. 6 a mpP/l ATTORNEY.

Patented July 3, 1923.

THOMAS L. cAM'PBEnL, or B RLIN. rnnnstz'rvnnmi-" f MiNE-CAR SKID.-

' I Application filed August 4, 1920. Serial No..401,159.

To all whom it mag concern:

Be it known that 1,.THOMAS L. "CAMPBELL,

a citizen of the United States, residing at Berlin in the county of Somerset and State of Pennsylvania, have invented certain new and useful Improvements in MineCar Skids; and I do hereby declare the following to be a full, clear, and exact description of the inventiornsuch as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a mine car skid for use in connection with cars used in coal and other mines and used as a brake for retrading movement of the cars and preventing the cars from traveling rapidly down an incline. Cars such as are used for carrying coal from a mine are not provided w1th brakes and therefore the improved skid has been provided for use upon the tracks; the

skids being connected with the forward end portion of the car and the wheels of the car moving on to the skids so that they will be raised out of engagement with the track and the car thus caused to slide instead of moving freely along the track.

Another object of the invention is to so construct the improved skid that it may be readily put in place and connected with the forward end portion of the car and to further so construct it that itwill be very strong and durable and not liable to break.

This invention is illustrated in the accompanying drawing wherein,

.Figure l is a side elevation showing a car upon a track with the improved skid in place.

Figure 2 is an enlarged perspective View of the skid. v

Figure 3 .is a transverse sectional view through the skid showing the same in place upon a rail.

Figure 4 is a detail side elevation of the attaching hook employed. I 45 This improved skid 10 is formed from a strip ,of angle iron which is provided with a depending side flange 11 for engaging the inner side of the head of the rail 12 as shown in Figure 3 so that the flange of a car wheel may engage this depending side flange 11 and hold the skid in tight engagement with the rail and thus prevent danger of the skid being moved outwardly and caused to drop off of the rail when in use. This flange ii isi'out' away from the forward andrear end portions of the skid'and the skidxis pro,-v

vided with a longitudinally extending depression thus providing side ribs 13 as shown in Figure 3 between which the skid is provided with openings 14. These openings 14 are used as sand retainers, that is, to catch sand which is dropped at intervals by the mine locomotive, to distribute the sand over the track to thereby afford greater resistance to the skid especiallyon grades. The forward end portion of the skid is bent upwardly t0 'rovide a tongue 15 -which tongue is provided with'openings to receive fastener bolts ,16 which pass through the inner or rear end portions of a strip The strip 17 extends beyond the forward end .of I

the'tongue 15and is provided with an open ing in which will be secured a shackle lS; carried by a chain 19, this-chain 19 carries at its free end a hook 20 for. engaging the forward end portion of the car.

Pairs of the skids will be-jointly used in practice, one being positioned under a wheel of and on eachside. of thecar. When the car reaches an incline and it is desired to prevent the carfrom travelling too rapidly down an incline the skid will be put in place with one skid on each side of thecara The skid will rest upon the rail as shown and the hook will enga e the forward end portion of the car. The car will then bep ermitted to move downthe incline and as soon as the frontwheels engage the skid they will move on to the skid as shown in Figure 1 so that they will not engage the trackand therefore the car will drag along the track and be prevented from moving too rapidly.

When the bottom of the incline is reached and the car has moved on to r the level stretch, the car may be moved backward and. the wheelswill roll ofiof the skid thus releasing the skids and permitting them to be removed from the track. 'It will thus be seen be easily removed bysimply moving the cars 7 rearwardly so that the wheels will move off i of the skids. If by any, means the skid should be broken it can be easily removed by simply removing the bolts 16 and a newskid put in place. It will thus be seen that there has been provided a skid whichfwill'be very.

extending upwardly and above saidsurface at the forward end of the skid, an attaching 'stnip member on said'skid in contact with the upper surface of said tongue and extending rearwardly to said surface, and the rear end of the strip terminating in advanee of the rear end ofthe skid and c0n-'.

stitu-ting anabutment rising from said surface and in the path of travel of the car wheel.

In testimony whereof I afiix my signature in presence of two witnesses.

I THOMAS L. CAMPBELL,

Witnesses:

WILLIAM CAMPBELL, JAMES CAMPBELL. 

